<template>
  <div class="child">
    <h2>我是child组件</h2>
  </div>
</template>

<script setup lang="ts" name="">
import { ref, reactive } from "vue";
let sum = ref(0);
let;
</script>
<style scoped>
.child {
  background-color: skyblue;
  border-radius: 10px;
  padding: 10px;
  box-shadow: 0 0 10px;
}
</style>
